Learning thermostat won’t connect anymore

[Macv]

I have multiple thermostats and for the past month one won’t connect to Wi-Fi or the app. I’ve tried resetting everything and now won’t even connect for setup. Is it possible that it’s junk and needs to be replaced?

[Patrick_Caezza]

Are you getting an error code?

When you go to Network, does it give you any networks to select from?

How do you have it wired?

[Macv]

It doesn’t find any networks and gives the w5 code. Wiring is just red ad white with no C wire. It worked fine for 2 years so I’m not sure what changed. 

[Markjosephp]

Hello folks,

I wanted to stop by and see how I could help.

Thanks for helping here, @Patrick_Caezza.

@Macv, I'm sorry to hear you're having an issue reconnecting your thermostat to your Wi-Fi network, and I appreciate all the steps you've taken. We'd love to take a closer look at this for you.

Could you please fill out this form with the needed information and let me know once you're done?

Regards,

Mark

[Patrick_Caezza]

You have a heat-only system, and they might work for a few years, but they will start having a power issue without the C wire.

Nest thermostats keep their internal batteries charged by using a power stealing function, and a two-wire heat-only system can't keep the battery fully charged, and after a while, the charge gets less and less.

When this happens, they will shut off the Wifi to save energy. If you install a C wire, your problem will probably go away. If you don't have an extra wire to use as a C wire, then you can use the Google Nest Power Connector and possibly an external 24Vac transformer.

[Markjosephp]

Hi there,

Thanks for the continued support, @Patrick_Caezza.

@Macv, I'm checking back in — how's it going? Have you had a chance to fill out the form? Let us know so we can assist you right away.

Regards,

Mark

[Jake]

Hey there,

I wanted to check in, and let you know that I will be locking the thread in 24 hours.

Best regards,

Jake